Title :
SAR instrument using stable active front-end technologies
Author :
Zahn, R. ; Braumann, H. ; Braubach, H.
Author_Institution :
Astrium GmbH, Friedrichshafen, Germany
Abstract :
The next generation of synthetic aperture radar (SAR) for high resolution will utilize active front-ends with the capability of beam-steering. The challenge for the DESA technology program for an active front-end was to control several hundreds of transmit/receive modules (T/R modules) independently with high speed from pulse to pulse, and to maintain the phase and amplitudes constant over -20°C to +60°C. Also for interferometry the stability of the RF front-end and electronics plays a dominant role. In this context the X-SAR/SRTM hardware is presented. The ambitious measurement of the phase variations in the instrument channels is essential for the instrument calibration and picture quality
Keywords :
beam steering; calibration; phase measurement; radar receivers; radar resolution; radar transmitters; radiowave interferometry; remote sensing by radar; stability; synthetic aperture radar; transceivers; DESA technology program; SAR; T/R modules; X-SAR/SRTM hardware; beam steering; instrument calibration; interferometry; phase measurement; picture quality; radar resolution; stable active front-end; synthetic aperture radar; transmit/receive modules; Calibration; Electronic mail; Hardware; Instruments; Interferometry; Phase measurement; Radio frequency; Stability; Synthetic aperture radar; Temperature distribution;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-7031-7
DOI :
10.1109/IGARSS.2001.977893
